knuckle down
"knuckle-down" is a 11-letter English headword indexed on PlainSpell.
The verdict
“knuckle down” is uncommon English (outside the top frequency list), classed as a verb. The kind of spelling people second-guess.
- Unranked
- below top-frequency English
- 12
- letters
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - To get to work; to focus on a task.
Corpus desk
Index EN-knuckle-down · knuckle down · English
knuckle down · unranked · 0 variants · 0 confusables
- FREQ-UNRANKED Unranked
- LEN-MEGA 12 letters
- VOW-3 3 vowels
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-THIN "K" thin
- PHOTO-UNK Peer pending
Read with this headword: Spelling guide for this pattern
Desk codes from Wiktionary headword shape, FrequencyWords rank tier, confusable-pair count, generated misspelling depth, letter-cohort book size, and photo-finish peer. Not a difficulty grade.
| Property | Value |
|---|---|
| Headword | knuckle down |
| Language | English |
| Part of speech | Verb |
| Letters | 12 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Long-tail rank of “knuckle down” in English
Rare enough to double-check
knuckle down is uncommon English outside the top frequency list, classed as averb. Rarity is why readers land here mid-draft. 2 senses are on record.
The misspelling generator found no plausible variants for knuckle down, and the word's spelling is regular enough that our generator found nothing worth flagging. We don't track a confusable pairing for this entry, which usually means its spelling is distinct enough that readers don't reach for a similar-looking word instead.
Etymologically, the entry records: 1864 in American English, from the game of marbles. The correct English form is knuckle down, spelled K-N-U-C-K-L-E- -D-O-W-N.
Definition
- 1To get to work; to focus on a task.
- 2To submit; knuckle under.
Recorded use
Wiktionary examplesThese source excerpts show how knuckle down appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.
You should knuckle down and do your homework!
As students all over the United States knuckle down to learning, the rumble of war drums once more proclaims Mars high man in Europe. Discarding morbid curiosity, every student should consider it vitally necessary to get a general picture of the causes, movements, and possible effects of World War II. The average U. S. citizen's knowledge of World War II…
Etymology
1864 in American English, from the game of marbles.
Synonyms
Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA). See the methodology for how each field is sourced and updated.